linux-kernel - Re: [PATCH v2 2/2] kbuild: handle excessively long argument lists

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 15 Jan 2021 12:15:26 -0800
From:   jjohnson@...eaurora.org
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Prasad Sodagudi <psodagud@...cinc.com>, eberman@...cinc.com,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Mahesh Kumar Kalikot Veetil <mkalikot@...eaurora.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/2] kbuild: handle excessively long argument lists

On 2021-01-14 17:12, Masahiro Yamada wrote:
> On Fri, Jan 15, 2021 at 6:50 AM Jeff Johnson <jjohnson@...eaurora.org> 
> wrote:
>> 
>> From: Mahesh Kumar Kalikot Veetil <mkalikot@...eaurora.org>
>> 
>> Modules with a large number of compilation units may be
>> exceeding AR and LD command argument list. Handle this gracefully by
>> writing the long argument list in a file. The command line options
>> read from file are inserted in place of the original @file option.
>> 
>> The usage is well documented at
>> https://www.gnu.org/software/make/manual/html_node/File-Function.html
>> 
>> Signed-off-by: Mahesh Kumar Kalikot Veetil <mkalikot@...eaurora.org>
>> Signed-off-by: Jeff Johnson <jjohnson@...eaurora.org>
>> ---
> 
> 
> 
> 
> First, is this a real problem?
> If so, which module is exceeding the command line limit?

On 2021-01-14 17:12, Masahiro Yamada wrote:
> First, is this a real problem?
> If so, which module is exceeding the command line limit?

Mahesh & I appreciate all of the feedback.

The issue is seen in an Android environment with an out-of-tree
driver. The combination of long path names and a large number
of source files is leading to the issue.

Since Mahesh & I are not Kbuild gurus, is there an alternative
solution to this issue?

Jeff

--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora 
Forum,
a Linux Foundation Collaborative Project